Phenyl acothienylthiazoaniline dis-azo dye for polyester fibers

ABSTRACT

A dis-azo dye for polyester fibers represented by the formula &lt;IMAGE&gt;   wherein Y is hydrogen or acetylamino and R1 and R2 are each C1-C4 alkyl, cyanoethyl, acetoxyethyl or C1-C4 alkoxyethyl.

This is a continuation of application Ser. No. 372,264, filed 4/26/82, now abandoned.

FIELD OF THE INVENTION

The present invention relates to a dis-azo dye for polyester fibers. The dye of the present invention provides polyester fiber with a color in the range of from navy blue to green. It is also capable of dyeing polyester fibers black by itself. It has great color fastness to light, sublimation and water, as well as high stability to temperature and pH changes during dyeing.

SUMMARY OF THE INVENTION

The dis-azo dye for polyester fibers of the present invention has the formula (I): ##STR2## wherein D is a substituted or unsubstituted phenyl group, a substituted or unsubstituted pyridyl group, or a substituted or unsubstituted thiazolyl group; X is a hydrogen atom, chlorine atom, bromine atom or an acetyl group; Y is a hydrogen atom, chlorine atom, bromine atom, methyl group or acylamino group; Z is a hydrogen atom, chlorine atom, methyl group, methoxy group or ethoxy group; R¹ and R² are each a hydrogen atom, a substituted or unsubstituted alkyl group, a cyclohexyl group, alkenyl group, or aryl group.

DETAILED DESCRIPTION OF THE INVENTION

Specific examples of D in the formula (I) are as follows: a phenyl group; a phenyl group substituted by a fluorine atom, chlorine atom, bromine atom, methyl group, ethyl group, trifluoromethyl group, methoxy group, ethoxy group, phenylazo group, cyano group, nitro group, methylsulfonyl group, ethylsulfonyl group, allylsulfonyl group, lower alkoxycarbonyl group, lower alkoxyethoxycarbonyl group, allyloxyethoxycarbonyl group, mono-lower alkylaminocarbonyl group, di-lower alkylaminocarbonyl group, diallylaminocarbonyl group, mono-allylaminocarbonyl group, dimethylaminosulfonyl group, diethylaminosulfonyl group, monomethylaminosulfonyl group, monoethylaminosulfonyl group, acetyl group or phenyl group; a pyridyl group; a pyridyl group substituted by a chlorine atom, bromine atom, nitro group, methyl group, methylsulfonyl group or cyano group; a thiazolyl group; and a thiazolyl group substituted by a methyl group, chlorine atom, bromine atom, nitro group, lower alkoxycarbonyl group, methoxyethoxycarbonyl group, ethoxyethoxycarbonyl group, trifluoromethyl group or methylsulfonyl group. Examples of the acylamino group represented by Y include an acetylamino group, chloroacetylamino group, benzoylamino group, methylsulfonylamino group, chloropropionylamino group, ethoxycarbonylamino group and ethylaminocarbonylamino group. Examples of the unsubstituted alkyl group represented by R¹ and R² include a methyl group, ethyl group, straight or branched propyl, butyl, pentyl, hexyl, heptyl and octyl groups. Examples of the substituted alkyl group represented by R¹ and R² include a lower alkoxyalkyl group such as a methoxyethyl group, ethoxyethyl group or butoxyethyl group; a lower alkoxyalkoxyalkyl group such as a methoxyethoxyethyl group or ethoxyethoxyethyl group; a phenoxyalkyl group such as a phenoxyethyl group; an aralkyloxy lower alkyl group which may be substituted such as benzyloxyethyl group or chlorobenzyloxyethyl group; a hydroxyalkyl group which may be substituted such as a hydroxyethyl group, hydroxypropyl group, hydroxybutyl group, hydroxyhexyl group, or 2-hydroxy-3-methoxypropyl group; a cyano lower alkyl group such as a cyanomethyl group or cyanoethyl group; an acyloxy lower alkyl group which may be substituted such as an acetyloxyethyl group, chloroacetyloxyethyl group, chloropropionyloxyethyl group or benzoyloxyethyl group; an alkoxycarbonyloxy lower alkyl group such as a methoxycarbonyloxyethyl group or methoxyethoxycarbonyloxyethyl group; a carbamoyl lower alkyl group such as a carbamoylmethyl group or carbamoylethyl group; an alkoxycarbonyl lower alkyl group which may be substituted such as a methoxycarbonylmethyl group, ethoxycarbonylmethyl group, methoxyethoxycarbonylmethyl group or benzyloxycarbonylmethyl group; an aralkyl group which may be substituted such as a benzyl group, phenethyl group or chlorobenzyl group; an allyloxycarbonyl lower alkyl group such as an allyloxycarbonylethyl group or allyoxycarbonylmethyl group; a tetrahydrofurfuryl group; a succinimide lower alkyl group such as a succinimide ethyl group; a phthalylimide lower alkyl group such as a phthalimide ethyl group; a cyanoalkoxy lower alkyl group such as a cyanoethoxyethyl group or cyanomethoxyethyl group; and a halogeno lower alkyl group such as a chloroethyl group. Examples of the aryl group represented by R¹ and R² include a phenyl group, chlorophenyl group and methylphenyl group.

The dis-azo dye of the formula (I) can be produced by diazotizing an amine of the formula (II):

    D-NH.sub.2                                                 (II)

wherein D is the same as defined above, coupling the diazotized amine with a 2-amino-4-thienylthiazole of the formula (III): ##STR3## wherein X is the same as defined above, diazotizing the resulting mono-azo compound of the formula (IV): ##STR4## wherein D and X are each the same as defined above, and coupling the resulting diazo compound with an aniline of the formula (V): ##STR5## wherein Y, Z, R¹ and R² are each the same as defined above.

Examples of the amine represented by the formula (II) include the following: a benzene amine such as aniline, o-, m- or p-fluoroaniline, o-, m- or p-chloroaniline, o-, m- or p-bromoaniline, 2,4-dichloroaniline, 2,3-dichloroaniline, 2-chloro-4-bromoaniline, 2,4-difluoroaniline, 2,4,6-trichloroaniline, o-, m- or p-tuluidine, o-, m- or p-ethylaniline, o-, m- or p-anisidine, m-trifluoromethylaniline, 4-phenylazoaniline, o- or p-cyanoaniline, o-, m- or p-nitroaniline, 2-chloro-4-nitroaniline, 2-bromo-4-nitroaniline, 2-cyano-4-nitroaniliane, 2-chloro-4-methoxyaniline, o-, m- or p-methylsulfonylaniline, o-, m- or p-ethylsulfonylaniline, o-, m- or p-methoxycarbonylaniline, o-, m- or p-ethoxycarbonylaniline, p-butoxycarbonylaniline, p-allyloxycarbonylaniline, p-allyloxyethoxycarbonylaniline, o-, m-or p-methoxyethoxycarbonylaniline, p-N,N-dimethylaminocarbonylaniliane, p-N-ethylaminocarbonylaniline, p-N-allylaminocarbonylaniline, 2-chloro-4-methoxycarbonylaniline, p-N,N-dimethylaminosulfonylaniline, m-N,N-diethylaminosulfonylaniline, p-N-ethylaminosulfonylaniline and p-phenylaniline; a pyridine amine such as 3-aminopyridine, 3-amino-6-bromopyridine, 3-amino-5-bromopyridine, 3-amino-6-chloropyridine, 4,6-dichloro-3-aminopyridine, 3-amino-6-nitropyridine, 3-amino-4-cyanopyridine, 3-amino-5-methylpyridine, 3-amino-6-methylsulfonylpyridine, 3-amino-4-chloro-6-nitropyridine, and 3-amino-5-methyl-6-bromopyridine; a thiazole amine such as 2-aminothiazole, 2-amino-4-methylthiazole, 2-amino-4-methyl-5-ethoxycarbonylthiazole, 2-amino-5-nitrothiazole, 2-amino-5-bromothiazole, 2-amino-5-chlorothiazole, 2-amino-4-trifluoromethylthiazole, 2-amino-4-methyl-5-methoxyethoxycarbonylthiazole and 2-amino-4-methyl-5-bromothiazole.

Fibers which can be dyed with the dis-azo dye of the present invention include polyester fibers made of polyethylene terephthalate or polycondensate of terephthalic acid and 1,4-bis(hydroxymethyl)cyclohexane, or blended yarn or fabric of such polyester fibers and natural fibers such as cotton, silk and wool.

The dye of the formula (I) is a water-insoluble or sparingly soluble in water, so polyester fibers can be dyed by exhaustion dyeing or printing with a dye bath or printing paste having this dye dispersed in an aqueous medium in the presence of a dispersant such as a naphthalenesulfonic acid-formaldehyde condensate, sulfuric acid ester of higher alcohol or higher alkylbenzenesulfonate salt. For instance, conventional techniques of dip dyeing such as high-temperature dyeing, carrier dyeing and thermosol dyeing can be employed to dye polyester fibers or their blends with natural fibers, and the so dyed fibers have satisfactory fastness properties. Better results are obtained by incorporating in the dye bath an acidic substance such as formic acid, acetic acid, phosphoric acid or ammonium sulfate. The dyes of the formula (I) can be used in combination with the same or other lines of dye. The combination of the dyes of the formula (I) with themselves provides better results with respect to dyeing properties (substantivity).

The present invention is now described in greater detail by reference to the following non-limiting example.

EXAMPLE 1

A dye bath was prepared by dispersing 0.5 of a dye of the formula: ##STR6## in 3 l of water containing 1 g of napthalenesulfonic acid-formaldehyde condensate and 2 g of sulfuric acid ester of higher alcohol. 100 g of polyester fibers was immersed in the bath for 60 minutes at 130° C., soaped, rinsed and dried. The dyed fibers was navy blue in color and had great fastness to light, sublimination and water. The dye had high stability to temperature and pH changes during the dyeing.

The dye used in this example was prepared as follows: 9.3 g of aniline was dissolved in 150 ml of 4% hydrochloric acid. The solution was cooled to 2° C. and mixed with 50 ml of 2 N sodium nitrite, with care taken not to cause the temperature of the mixture to exceed 5° C. The resulting solution of aniline in diazonium salt was added to a solution of 2-amino-4-thienylthiazole (18.2 g) in methanol (200 ml) to 2° C., and the mixture was stirred at 2° C. for 2 hours. The precipitating monoazo compound was filtered off, washed with water and dried. The mono-azo compound or 2-amino-4-thienyl-5-phenylazothiazole (14.3 g) was added to a mixture of acetic acid (143 ml) and phosphoric acid (143 ml). To the resulting mixture, nitrosylsulfuric acid (prepared by dissolving 3.5 g of sodium nitrite in 20 g of 97% sulfuric acid) was added gradually at 0° to 5° C., and the mixture was stirred at 0° to 5° C. for 30 minutes to prepare a diazo solution of the mono-azo compound. A solution of N-(ethyl)-N-(β-acetoxyethyl)aniline (10.5 g) in 200 ml of methanol was added to a mixture of ice (200 g) and water (100 ml). To the resulting mixture, the previously prepared diazo solution was added, and the mixture was stirred at 0° to 5° C. for 2 hours. The precipitating dis-azo dye was filtered off, washed with water and dried. The dried dis-azo dye had a λmax (in acetone) at 609 nm.

EXAMPLE 2

As in Example 1, polyester fabrics were dyed with the compounds indicated in Table 1, and the respective fabrics were given the colors also indicated in Table 1.

    TABLE 1       ##STR7##               Dyeing Shade λ max        (on polyester (acetone) No. D      X Y Z R.sup.1 R.sup.2 fibers) nm                 1       ##STR8##       H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Navy blue 600  2 " " " " "      C.sub.2 H.sub.4 COOCH.sub.3 " 610 3 " " " " " C.sub.2 H.sub.4       OCOOCH.sub.3 " 608 4 " " " " " C.sub.2 H.sub.4 COOCH.sub.2 CHCH.sub.2 "      610 5 " " " " " C.sub.2 H.sub.4 OCH.sub.3 " 617 6 " " " " " C.sub.2      H.sub.5 " 621 7 " " " " " C.sub.4 H.sub.9 (n) " 623  8 " " " " "       ##STR9##       " 614  9 " " " " " H " 591 10 " " " " " CH.sub.2 COOCH.sub.3 " 592  11       ##STR10##       H H H C.sub.2       H.sub.5      ##STR11##       Navy blue 615  12 " " " " " C.sub.2 H.sub.4 OCOCH.sub.2 Cl " 607 13 " "      " " " C.sub.2 H.sub.4 COOC.sub.4 H.sub.9 (i) " 610  14 " " " " "       ##STR12##       " 618  15 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4       OCOCH.sub.3 " 602 16 " " " " C.sub.2 H.sub.4 OCOOCH.sub.3 C.sub.2      H.sub.4 OCOOCH.sub.3 " 598 17 " " " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2      H.sub.4 OCH.sub.3 " 615 18 " " " " C.sub.2 H.sub.4 OCH.sub.2CHCH.sub.2      C.sub.2 H.sub.4 OCH.sub.2CHCH.sub.2 " 613 19 " " " " C.sub.2 H.sub.4      COOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 " 603 20 " " " "  C.sub.2      H.sub.4 COOCH.sub.3 H " 586 21 " " " " CH.sub.2 COOCH.sub.3 CH.sub.2      COOCH.sub.3 " 582 22 " " " " CH.sub.3 CH.sub.3 " 614       23      ##STR13##       H H H CH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 607  24 " " " "      CH.sub.2CHCH.sub.2 CH.sub.2CHCH.sub.2 " 616 25 " " " " " C.sub.2 H.sub.4      CN " 597 26 " " " " " C.sub.2 H.sub.4 COOCH.sub.3 " 608 27 " " " " "      C.sub.2 H.sub.4 OCOCH.sub.3 " 606 28 " " " " " CH.sub.2 COOCH.sub.3 "      596 29 " " " " C.sub.3 H.sub.7 (n)  C.sub.2 H.sub.4 CN " 602 30 " " " "      " C.sub.3 H.sub.7 (n) " 624 31 " " " " " C.sub.2 H.sub.4 OH " 622  32 "      " " "       ##STR14##       ##STR15##       " 620  33 " " " " C.sub.2 H.sub.4 OCOC.sub.2 H.sub.4 Cl C.sub.2 H.sub.4      OCOC.sub.2 H.sub.4 Cl " 600 34 " " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2      H.sub.4 CN " 613       35      ##STR16##       H CH.sub.3 H C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOCH.sub.3 Navy blue 622      36 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 614      37 " " " " C.sub.2 H.sub.4 COOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 " 615       38 " " " " H      ##STR17##       " 603  39 " " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OH Green 634 40 " "      NHCOCH.sub.3 " " C.sub.2 H.sub.5 " 630 41 " " " " C.sub.2 H.sub.4      OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 Navy blue 615 42 " " " " C.sub.2      H.sub.4 CN C.sub.2 H.sub.5 " 613 43 " " " " C.sub.2 H.sub.4 OCH.sub.3      C.sub.2 H.sub.4 OCH.sub.3 " 623 44 " " " " C.sub.2 H.sub.4 COOC.sub.2      H.sub.5 C.sub.2 H.sub.4 COOC.sub.2 H.sub.5 " 617 45 " " " CH.sub.3      C.sub.2 H.sub.5 H " 615 46 " " " OCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 "      " 609       47      ##STR18##       H NHCOCH.sub.3 OCH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.5 Green 638  48      " " Cl H C.sub.2 H.sub.4 CN " Navy blue 588  49 " " " " C.sub.2 H.sub.5       ##STR19##       " 586  50 " " " " CH.sub.2CHCH.sub.2 CH.sub.2 COOCH.sub.3 " 583 51 " "      " " C.sub.2 H.sub.5 CH.sub.2 COOCH.sub.2CHCH.sub.2 " 586 52 " " " "      C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 589 53 " " " " C      .sub.2 H.sub.4 OCOOC.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOOC.sub.2 H.sub.5 "      587 54 " Cl H CH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.4 COOCH.sub.3 " 615      55 " " " Cl " C.sub.2 H.sub.4 CN " 593       56      ##STR20##       Br " H " C.sub.2 H.sub.4 OCOCH.sub.3 " 606  57 " " CH.sub.3 " " C.sub.2      H.sub.4 COOC.sub.2 H.sub.5 " 618       58      ##STR21##       Br CH.sub.3 H C.sub.2 H.sub.4 COOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3      Navy blue 611  59 " " " " C.sub.2 H.sub.5 CH.sub.2 COOCH.sub.3 " 615 60      " COCH.sub.3 H " " C.sub.2 H.sub.4 CN " 592 61 " " NHCOCH.sub.3 "      C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 " 621       62      ##STR22##       H H " C.sub.2 H.sub.4 CN C.sub.2 H.sub.5 " 608  63 " " " " C.sub.2      H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 610 64 " " " " C.sub.2      H.sub.5 H " 602 65 " Cl Cl " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4      OCOCH.sub.3 " 602 66 " H NHCOCH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.5      " 637 67 " COCH.sub.3 H " C.sub.2 H.sub.4 COOCH.sub.3 H " 589  68       ##STR23##       H CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 622       69      ##STR24##       H H H C.sub.2 H.sub.4 OC.sub.4 H.sub.9 (n) C.sub.2 H.sub.4 OC.sub.4      H.sub.9 (n) Navy blue 620  70 " " CH.sub.3 " C.sub.2 H.sub.4 OCOCH.sub.3 C      .sub.2 H.sub.4 CN " 610       71      ##STR25##       " Cl CH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOCH.sub.3 " 613  72 " " H       H H       ##STR26##       " 601  73 " " CH.sub.3 " C.sub.2       H.sub.5      ##STR27##       " 624  74 " " " " H H " 601       75      ##STR28##       " H " C.sub. 2 H.sub.5 C.sub.2 H.sub.4 CN Green 628  76 " " " " "      C.sub.2 H.sub.4 OCOCH.sub.3 " 639 77 " " CH.sub.3 " " C.sub.2 H.sub.4 CN      " 641 78 " " NHCOCH.sub.3 " " C.sub.2 H.sub.5 " 655       79      ##STR29##       H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Navy blue 619       80      ##STR30##       " Cl " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 612      81       ##STR31##       " CH.sub.3 " " C.sub.2 H.sub.4 CN " 603       82      ##STR32##       " H CH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.5 Green 645  83 " " " Cl " H      Navy blue 615 84 " " " H C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 CN      " 623 85 " " CH.sub.3 " C.sub.2 H.sub.5 " Green 635       86      ##STR33##       " H " " " " 625       87      ##STR34##       H NHCOCH.sub.3 H C.sub.2 H.sub.5 C.sub.2 H.sub.5 Green 645       88      ##STR35##       " H " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue      615  89 " " " " CH.sub.2CHCH.sub.2 C.sub.2 H.sub.4 OCOCH.sub.3 "  622      90       ##STR36##       " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 625       91      ##STR37##       " " " C.sub.2 H.sub.4 OCOC.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOC.sub.2      H.sub.5 " 621       92      ##STR38##       " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 612  93 " " " " C.sub.2      H.sub.4 OC.sub.2 H.sub.5 C.sub.2 H.sub.4 OC.sub.2 H.sub.5 " 625  94       ##STR39##       " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOC.sub.2 H.sub.4 Cl Green 642      95       ##STR40##       H H H C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 Green 631       96      ##STR41##       " " " C.sub.2 H.sub.4 CN C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 623  97       ##STR42##       " " " CH.sub.2CHCH.sub.2 C.sub.2 H.sub.4 CN " 617       98      ##STR43##       " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCH.sub.3 " 627  99       ##STR44##       " H " " C.sub.2 H.sub.4 CN " 624       100      ##STR45##        " " " C.sub.2 H.sub.4 OCOOCH.sub.3 C.sub.2 H.sub.4 OCOOCH.sub.3 " 597      101       ##STR46##       Cl NHCOCH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.5 " 629       102      ##STR47##       H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 617  103       ##STR48##       " " " " C.sub.2 H.sub.4 OCOOCH.sub.3 " 621       104      ##STR49##       " " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 Green 638      105       ##STR50##       " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OH " 645       106      ##STR51##       " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 Navy blue      613       107      ##STR52##       " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Green 640       108      ##STR53##       " H " " C.sub.2 H.sub.4 OCOCH.sub.3 " 637       109      ##STR54##       H CH.sub.3 H C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOCH.sub.3 Green 654  110       ##STR55##       " Cl " C.sub.2 H.sub.4 OCOCH.sub.3 " Navy blue 605       111      ##STR56##       " CH.sub.3 "  C.sub.2 H.sub.5 C.sub.2 H.sub.4       CN " 623

EXAMPLE 3

A dye bath was prepared by dispersing 4.0 g of a dye of the formula: ##STR57## in 3 l of water containing 1 g of naphthalenesulfonic acid-formaldehyde condensate and 2 g of sulfuric acid ester of higher alcohol. 100 g of polyester fabric was immersed in the bath for 60 minutes at 130° C., soaped, rinsed and dried. The dyed fabric was black in color and had great color fastness to light, sublimination and water. The dye had high stability to temperature and pH changes during the dyeing. The dye used in this example was prepared as in Example 1, and had a λmax (in acetone) at 600 nm.

EXAMPLE 4

As in Example 3, polyester fabrics were dyed with the compounds indicated in Table 2, and all fabrics were dyed black.

                                      TABLE 2                                      __________________________________________________________________________      ##STR58##                                                                                                                               λ max                                                         Dyeing Shade                                                                             (acetone)            No.                                                                               D           X  Y       Z   R.sup.1  R.sup.2  (on polyester                                                                            nmbers)              __________________________________________________________________________         ##STR59##  H  H       H   C.sub.4 H.sub.9 (n)                                                                     C.sub.2 H.sub.4 CN                                                                      Black     605                  2  "           "  "       "   C.sub.3 H.sub.6 COOCH.sub.3                                                             C.sub.2 H.sub.5                                                                         "         622                  3  "           "  "       "   C.sub.2 H.sub.4 OCOCH.sub.3                                                             C.sub.2 H.sub.4 CN                                                                      "         592                  4  "           "  CH.sub.3                                                                               "   C.sub.2 H.sub.5                                                                         "        "         612                  5                                                                                  ##STR60##  "  H       "   "        "        "         627                  6  "           "  "       "   "        C.sub.2 H.sub.4 OCOCH.sub.3                                                             "         635                  7  "           "  "       "   C.sub.2 H.sub.4 OCH.sub.3                                                               "        637                            8  "           "  NHCOCH.sub.3                                                                           "   C.sub.2 H.sub.5                                                                         C.sub.2 H.sub.5                                                                         "         658                  9                                                                                  ##STR61##  "  H       "   C.sub.2 H.sub.4 OCOCH.sub.3                                                             C.sub.2 H.sub.4 OCOCH.sub.3                                                             "         628                  10                                                                                 ##STR62##  H  H       H   C.sub.2 H.sub.5                                                                         C.sub.2 H.sub.4 CN                                                                      Black     648                  11 "           "  "       "   "        C.sub.2 H.sub.4 OCH.sub.3                                                               "         659                  12                                                                                 ##STR63##  "  "       "   "        C.sub.2 H.sub.4 COOCH.sub.3                                                             "         613                  13                                                                                 ##STR64##  "  "       "   C.sub.2 H.sub.4 COOCH.sub.3                                                             "        "         615                  14                                                                                 ##STR65##  "  "       "   C.sub.2 H.sub.5                                                                         "        "         638                  15 "           "  "       "   C.sub.2 H.sub.4 OCH.sub.3                                                               C.sub.2 H.sub.4 OCH.sub.3                                                               "         640                  __________________________________________________________________________

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof. 

What is claimed is:
 1. A dis-azo dye for polyester fibers represented by the formula ##STR66## wherein Y is hydrogen or acetylamino, and R¹ and R² are each C₁ -C₄ alkyl, cyanoethyl, acetoxyethyl or C₁ -C₄ alkoxyethyl. 